L&T Company Logical Reasoning Seating Arrangement

Eight people J, K, L, M, N, O, P and Q are sitting around a circular table, facing the centre, not necessarily in the same order. O is sitting third to the right of M. There is only one person sitting between M and J. There are only three people between J and K. P is an immediate neighbour of J. There are only three people between P and L. N is second to the right of P. What is position of N with respect to K?
A.Second to the left B.Second to the right C. Third to the left D.Third to the right E.Fourth to the left

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L&T Other Question

Excluding stoppages, the speed of a bus is 70 kmph and including stoppages, it is 60 kmph. For how many minutes does the bus stop per hour?
A.12 B.10 C.15 D.20
What is the difference between primary key and unique key?
A)Primary Key is used to identify a column (record) in a table, whereas Unique-key is to prevent duplicate values in a row (with the exception of a null entry) B)By default SQL-engine creates Non-Clustered Index on primary-key if not exists and Clustered Index on Unique-key C)Primary key does not include Null values, whereas Unique-key can
D)Table can have multiple primary key but can have single Unique-key E)You can change or delete primary values, but Unique-key values can not be changed